This is a great example of how these massive for-profit companies can be actively harmful to the public good. I'm not sure how to combat these issues, which are genuine challenges against freedom everywhere, but perhaps stronger oversight from our elected leaders should be involved, the way Congress is able to put a check on our public institutions.
We already have laws for this. "Auto-generating" steps outside of "user generated content" and Facebook should get charged with conspiracy.
How about treating the root problem (that there are masses enough of people talking about it to trigger more benign mechanisms) instead of just demanding that they sweep it under the rug?